EFFECT OF SOME ANIONS ON THE CORROSION CHARACTERISTICS OF Fe//4//0Ni//4//0B//2//0 METALLIC GLASS.

Abstract

The corrosion behavior of Fe//4//0Ni//4//0B//2//0(0040) metallic glass in the presence of sodium salts of Na//2SO//4, Na//2CO//3, Na//2HPO//4, NaNO//3, Na//2MoO//4, Na//2WO//4 and Na//2CrO//4 was investigated. The open circuit potential (OCP) variation in solutions containing these salts in concentration from 0. 1 M to 0. 001 M were measured up to 2 hours. The anodic polarization curves of the alloy have been recorded under potentiostatic condition. The OCP shifted towards the noble direction in presence of chromate and tungstate while towards the active direction in the case of the other anions in ennobling the alloy under OCP conditions.